Mixing and stirring device for SMC (Sheet Molding Compound) production
By introducing a combination design of a vibrating screen and grinding block screening component with a counter-rotating stirring rod into the SMC sheet production unit, the problem of insufficient mixing uniformity is solved, achieving efficient SMC sheet mixing and improved finished product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-03-06
AI Technical Summary
Traditional SMC sheet production mixing equipment lacks effective pre-screening and crushing functions, resulting in insufficient uniformity of the mixed material. Furthermore, the force exerted by the stirring device on the material in different areas of the tank is uneven, which can easily create dead zones in the mixing process and affect the molding quality.
The system employs a combination design of screening components including a vibrating screen and grinding blocks, along with downward and upward tilting stirring rods. Combined with the scraping function of the scraper, it achieves online screening and crushing of raw materials. Furthermore, the reverse rotation design creates a three-dimensional shearing effect, ensuring uniform mixing.
It achieves improved uniformity of raw material particle size, increased mixing efficiency, and eliminates dead corner residues in the tank. It is particularly suitable for the uniform dispersion of high-viscosity SMC materials, thereby improving the quality of the finished product.
Smart Images
Figure CN223971928U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of SMC sheet production technology, and in particular to a mixing and stirring device for SMC sheet production. Background Technology
[0002] Sheet molding compound (SMC) is a fiber-reinforced thermosetting composite material widely used in automotive, construction, and electrical industries. During its production, the uniformity of raw material mixing is a key factor affecting the performance of the final product.
[0003] Traditional SMC sheet production mixing devices mostly employ a single stirring structure. On the one hand, raw materials often contain agglomerated or large-particle resins and fillers, and existing mixing devices lack effective pre-screening and crushing functions, resulting in insufficient uniformity of the mixed material and affecting the quality of subsequent molding. On the other hand, conventional stirring blade designs are simple, leading to uneven force on materials in different areas of the tank, especially poor mixing at the bottom and side walls, easily creating mixing dead zones. Therefore, we propose a mixing device for SMC sheet production. Utility Model Content
[0004] The present invention aims to solve the technical problems existing in the prior art and provide a mixing and stirring device for SMC sheet production.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a mixing and stirring device for SMC sheet production, comprising a mixing tank, two symmetrically arranged flip-tops movably mounted on the upper end of the mixing tank, multiple equidistantly arranged support legs fixedly mounted on the bottom surface of the mixing tank, a discharge pipe connected to the interior of the mixing tank fixedly mounted on the lower outer wall of the mixing tank, a first servo motor fixedly mounted at the center of the upper surface of the mixing tank, the output end of the first servo motor extending into the interior of the mixing tank and a central rod fixedly mounted on the output end, multiple downwardly inclined stirring rods fixedly mounted on the central rod, a screening assembly movably mounted above the multiple downwardly inclined stirring rods at the upper interior of the mixing tank, the screening assembly specifically including a vibrating screen and a grinding block movable on the upper surface of the vibrating screen, and a scraping assembly rotatably mounted at the lower end of the mixing tank, the scraping assembly specifically including two symmetrically arranged scraper rods.
[0006] Preferably, the screening assembly further includes a retaining ring fixedly installed on the inner wall of the upper end of the mixing tank. The retaining ring is located below the vibrating screen and supports the edge of the vibrating screen. The central rod passes through the center of the vibrating screen, and a rotating rod is fixedly installed on the outer wall of the central rod above the vibrating screen. The end of the rotating rod is fixedly connected to the upper surface of the grinding block.
[0007] Preferably, the scraping assembly further includes a second servo motor fixedly installed on the bottom surface of the mixing tank. The output end of the second servo motor extends into the interior of the mixing tank and is fixedly installed with a docking shaft. The lower end of the scraper is fixedly connected to the outer walls on both sides of the docking shaft, and the scraper contacts and fits against the inner wall of the mixing tank.
[0008] Preferably, the upper end face of the mixing tank is fixedly mounted with a first fixing block on both sides of the first servo motor. An electric slide is fixedly mounted on the first fixing block. The electric slide specifically includes an electric slide rail fixedly connected to the first fixing block and an electric slider slidably mounted on the electric slide rail. The electric slider is fixedly connected to the corresponding position on the flip cover.
[0009] Preferably, both flip covers are fixedly equipped with handles, and the handles have an L-shaped cross-section.
[0010] Preferably, multiple upward-inclined stirring rods are fixedly installed on the scraper, and the multiple upward-inclined stirring rods are staggered among the multiple downward-inclined stirring rods.
[0011] Preferably, a protective cover is fixedly installed on the bottom surface of the mixing tank, and the protective cover is located outside the second servo motor.
[0012] Beneficial effects
[0013] This invention provides a mixing and stirring device for SMC sheet production. It has the following beneficial effects:
[0014] (1) The mixing and stirring device for SMC sheet production achieves online screening and synchronous crushing of raw materials through the dynamic and static coordination of the vibrating screen and the grinding block, eliminating the defect of offline processing of the screen material in the traditional process, ensuring the uniformity of raw material particle size, and improving the subsequent mixing efficiency and finished product quality.
[0015] (2) The mixing and stirring device for SMC sheet production adopts a reverse rotation design for the downward and upward stirring rods. Combined with the wall cleaning function of the scraper, it forms a triple effect of vertical convection, radial diffusion and wall cleaning, which improves the mixing efficiency by about %. There are no dead corners in the tank, which is especially suitable for the uniform dispersion of high viscosity SMC materials. Attached Figure Description
[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the internal structure of the mixing tank of this utility model;
[0020] Figure 3 This is a schematic diagram of the flip-top structure of this utility model.
[0021] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle.
[0022] Legend: 1. Mixing tank; 2. Support leg; 3. Flip-top; 4. Handle; 5. First servo motor; 6. First fixing block; 7. Electric slide; 8. Second servo motor; 9. Protective cover; 10. Scraper; 11. Upward-inclined stirring rod; 12. Center rod; 13. Vibrating screen; 14. Retaining ring; 15. Rotating rod; 16. Grinding block; 17. Downward-inclined stirring rod; 18. Discharge pipe; 19. Connecting shaft. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] like Figure 1-4As shown, a mixing and stirring device for SMC sheet production includes a mixing tank 1. Two symmetrically arranged flip-tops 3 are movably mounted on the upper end of the mixing tank 1. Multiple equidistant support legs 2 are fixedly mounted on the bottom surface of the mixing tank 1. A discharge pipe 18, communicating with the interior of the mixing tank 1, is fixedly mounted on the lower outer wall of the mixing tank 1. A first servo motor 5 is fixedly mounted at the center of the upper surface of the mixing tank 1. The output end of the first servo motor 5 extends into the interior of the mixing tank 1, and a central rod 12 is fixedly mounted on the output end. Multiple downwardly inclined stirring rods 17 are fixedly mounted on the central rod 12. A screening assembly is movably mounted above the multiple downwardly inclined stirring rods 17 at the upper interior of the mixing tank 1. The screening assembly specifically includes a vibrating screen 13 and a grinding block 16 movable on the upper surface of the vibrating screen 13. A scraping assembly is rotatably mounted at the lower end of the mixing tank 1. The scraping assembly specifically includes... The mixing tank 1 is equipped with two symmetrically arranged scraper rods 10. In use, the two flip-top covers 3 that are movably installed on the upper end of the mixing tank 1 are flipped upwards. Then, the raw materials required for the production of SMC sheets are put into the mixing tank 1 through the open upper end of the mixing tank 1. After being selected by the vibrating screen 13, the raw materials fall into the mixing tank 1. The vibrating screen 13 is a prior art technology. The screen plate is vibrated by a vibrator. Under the drive of the first servo motor 5, multiple downward-sloping stirring rods 17 fixed on the outer wall of the central rod 12 stir the raw materials. At the same time, the two scraper rods 10 located at the lower end of the mixing tank 1 rotate synchronously. When the two scraper rods 10 rotate, they can simultaneously scrape off the SMC sheet raw materials attached to the inner wall of the mixing tank 1, ensuring that the various raw materials inside the mixing tank 1 can be fully mixed. After the various raw materials are mixed evenly by stirring, they can be discharged out through the discharge pipe 18.
[0025] like Figure 2 As shown, the screening assembly also includes a retaining ring 14 fixedly installed on the inner wall of the upper end of the mixing tank 1. The retaining ring 14 is located below the vibrating screen 13 and supports the edge of the vibrating screen 13. The central rod 12 passes through the center of the vibrating screen 13. A rotating rod 15 is fixedly installed on the outer wall of the central rod 12 above the vibrating screen 13. The end of the rotating rod 15 is fixedly connected to the upper surface of the grinding block 16. The grinding block 16 is fixedly connected to the central rod 12 through the rotating rod 15. When the central rod 12 rotates, the grinding block 16 can grind the sheet material with larger particles on the upper surface of the vibrating screen 13. The cross-section of the vibrating screen 13 and the bottom surface of the grinding block 16 are arranged in a matching arc shape.
[0026] like Figure 2As shown, the scraping assembly also includes a second servo motor 8 fixedly mounted on the bottom surface of the mixing tank 1. The output end of the second servo motor 8 extends into the interior of the mixing tank 1 and is fixedly mounted with a docking shaft 19. The lower end of the scraper 10 is fixedly connected to the outer walls on both sides of the docking shaft 19, and the scraper 10 contacts and adheres to the inner wall of the mixing tank 1. By driving the docking shaft 19 to rotate through the second servo motor 8, the two scraper 10 can be driven to rotate continuously when the docking shaft 19 rotates. The outer walls of the two scraper 10 adhere to the inner wall of the mixing tank 1, so that the SMC raw material adhering to the inner wall of the mixing tank 1 can be scraped off when the scraper 10 rotates, so that the various raw materials can be fully mixed.
[0027] like Figure 1 As shown, the upper end face of the mixing tank 1 is fixedly mounted with first fixing blocks 6 on both sides of the first servo motor 5. An electric slide table 7 is fixedly mounted on the first fixing block 6. The electric slide table 7 specifically includes an electric slide rail fixedly connected to the first fixing block 6 and an electric slider slidably mounted on the electric slide rail. The electric slider is fixedly connected to the corresponding position on the flip cover 3. When powered on, the flip cover 3 can be automatically opened by the electric slide table 7, which facilitates the input of SMC sheet raw materials into the mixing tank 1.
[0028] like Figure 2 As shown, each of the two flip covers 3 is fixedly equipped with a handle 4, and the cross-section of the handle 4 is L-shaped; the handle 4 is designed to facilitate the manual opening of the flip cover 3 in the event of a power outage.
[0029] like Figure 2 As shown, multiple upward-inclined stirring rods 11 are fixedly installed on the scraper 10, and the multiple upward-inclined stirring rods 11 are staggered between the multiple downward-inclined stirring rods 17; the multiple upward-inclined stirring rods 11 and the downward-inclined stirring rods 17 are used together to enhance the mixing effect of various raw materials for producing SMC sheets inside the mixing tank 1.
[0030] like Figure 2 As shown, a protective cover 9 is fixedly installed on the bottom surface of the mixing tank 1, and the protective cover 9 is located outside the second servo motor 8; the protective cover 9 can protect the second servo motor 8 and prevent the second servo motor 8 from getting damp, etc., and the protective cover 9 has multiple heat dissipation holes for the second servo motor 8 to dissipate heat.
[0031] The working principle of this utility model is as follows: In use, the electric sliding table 7 drives the flip cover 3 to open automatically, or the manual handle 4 assists in opening the cover, allowing SMC raw materials to be added into the mixing tank 1. The raw materials fall onto the surface of the vibrating screen 13. The vibrating screen 13 screens the raw materials through the action of the vibrator. Qualified fine materials directly pass through the screen holes into the mixing zone, while larger particles that do not pass are dynamically crushed under the synergistic action of the grinding blocks 16 and the vibrating screen 13. Specifically, the first servo motor 5 drives the central rod 12 to rotate the rotating rod 15 and the grinding blocks 16. The bottom surface of the grinding blocks 16 forms a periodic compression and grinding action with the arc-shaped screen surface of the vibrating screen 13. The grinding process crushes and screens the raw materials. After screening, the raw materials enter the mixing zone. The central rod 12 drives the downward-inclined stirring rod 17 to rotate at high speed, forming a downward vortex. At the same time, the second servo motor 8 drives the scraper 10 to rotate in the opposite direction, and the upward-inclined stirring rod 11 on it generates an upward turbulence. The two opposing rotating mixing flows form three-dimensional shearing and convection, which thoroughly disperses the materials and makes the various raw materials evenly mixed. The scraper 10 continuously rotates against the inner wall of the mixing tank 1, scraping off the adhering raw materials in real time. After mixing is completed, the mixture is discharged through the discharge pipe 18. The residual materials are completely cleaned when the scraper 10 rotates for the last time, ensuring that there are no residues in the tank.
[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A mixing and stirring device for SMC sheet production comprising a stirring tank (1), characterized in that: The upper end of the stirring tank (1) is movably provided with two symmetrical lids (3), the bottom surface of the stirring tank (1) is fixedly provided with a plurality of equidistant supporting legs (2), the lower end of the stirring tank (1) is fixedly provided with a discharge pipe (18) in communication with the inside of the stirring tank (1), the center of the upper end surface of the stirring tank (1) is fixedly provided with a first servo motor (5), the output end of the first servo motor (5) extends into the inside of the stirring tank (1) and is fixedly provided with a central rod (12), a plurality of downward inclined downward stirring rods (17) are fixedly provided on the central rod (12), a screening assembly is movably provided on the upper end of the inside of the stirring tank (1) above the plurality of downward stirring rods (17), the screening assembly specifically comprises a vibrating screen (13) and a grinding block (16) movably provided on the upper surface of the vibrating screen (13), and a scraping assembly is rotatably provided at the lower end of the stirring tank (1), the scraping assembly specifically comprises two symmetrical scraping rods (10).
2. A mixing and stirring device for SMC sheet production according to claim 1 characterized in that: The screening assembly further comprises a retaining ring (14) fixedly provided on the inner wall of the upper end of the stirring tank (1), the retaining ring (14) is provided below the vibrating screen (13) and supports the edge of the vibrating screen (13), the central rod (12) penetrates through the center of the vibrating screen (13), and a rotating rod (15) is fixedly provided on the outer wall of the central rod (12) above the vibrating screen (13), the distal end of the rotating rod (15) is fixedly connected with the upper surface of the grinding block (16).
3. A mixing and stirring device for SMC sheet production according to claim 2, characterized in that: The scraping assembly further comprises a second servo motor (8) fixedly provided on the bottom surface of the stirring tank (1), the output end of the second servo motor (8) extends into the inside of the stirring tank (1) and is fixedly provided with a butt shaft (19), the lower end of the scraping rod (10) is fixedly connected with the outer wall of the butt shaft (19) on both sides, and the scraping rod (10) is in contact and attached with the inner wall of the stirring tank (1).
4. A mixing and stirring device for SMC sheet production according to claim 3, characterized in that: First fixed blocks (6) are fixedly provided on the upper end surface of the stirring tank (1) on both sides of the first servo motor (5), electric sliding platforms (7) are fixedly provided on the first fixed blocks (6), the electric sliding platform (7) specifically comprises an electric sliding rail fixedly connected with the first fixed block (6) and an electric sliding block slidably provided on the electric sliding rail, and the electric sliding block is fixedly connected with the corresponding position on the lid (3).
5. A mixing and stirring device for SMC sheet production according to claim 4, characterized in that: A handle (4) is fixedly provided on each of the two lids (3), and the cross section of the handle (4) is L-shaped.
6. A mixing and stirring device for SMC sheet production according to claim 5, characterized in that: A plurality of upward stirring rods (11) are fixedly provided on the scraping rod (10) and are staggered between the plurality of downward stirring rods (17).
7. A mixing and stirring device for SMC sheet production according to claim 6, characterized in that: A protective cover (9) is fixedly provided on the bottom surface of the stirring tank (1) and is provided outside the second servo motor (8).